

    var settings = {
    particles: {
    length: 500,
    duration: 2,
    velocity: 100,
    effect: -0.75,
    size: 30,
},
};


    (function
    () {var b = 0; var c = ["ms", "moz", "webkit", "o"]; for (var a = 0; a < c.length && !window.requestAnimationFrame; ++a) {window.requestAnimationFrame = window[c[a] + "RequestAnimationFrame"]; window.cancelAnimationFrame = window[c[a] + "CancelAnimationFrame"] || window[c[a] + "CancelRequestAnimationFrame"]} if (!window.requestAnimationFrame) {window.requestAnimationFrame = function (h, e) {var d = new Date().getTime(); var f = Math.max(0, 16 - (d - b)); var g = window.setTimeout(function () {h(d + f)}, f); b = d + f; return g}} if (!window.cancelAnimationFrame) {window.cancelAnimationFrame = function (d) {clearTimeout(d)}}}());


    var Point = (function () {
    function Point(x, y) {
        this.x = (typeof x !== 'undefined') ? x : 0;
        this.y = (typeof y !== 'undefined') ? y : 0;
    }
    Point.prototype.clone = function () {
    return new Point(this.x, this.y);
};
    Point.prototype.length = function (length) {
    if (typeof length == 'undefined')
    return Math.sqrt(this.x * this.x + this.y * this.y);
    this.normalize();
    this.x *= length;
    this.y *= length;
    return this;
};
    Point.prototype.normalize = function () {
    var length = this.length();
    this.x /= length;
    this.y /= length;
    return this;
};
    return Point;
})();


    var Particle = (function () {
    function Particle() {
        this.position = new Point();
        this.velocity = new Point();
        this.acceleration = new Point();
        this.age = 0;
    }
    Particle.prototype.initialize = function (x, y, dx, dy) {
    this.position.x = x;
    this.position.y = y;
    this.velocity.x = dx;
    this.velocity.y = dy;
    this.acceleration.x = dx * settings.particles.effect;
    this.acceleration.y = dy * settings.particles.effect;
    this.age = 0;
};
    Particle.prototype.update = function (deltaTime) {
    this.position.x += this.velocity.x * deltaTime;
    this.position.y += this.velocity.y * deltaTime;
    this.velocity.x += this.acceleration.x * deltaTime;
    this.velocity.y += this.acceleration.y * deltaTime;
    this.age += deltaTime;
};
    Particle.prototype.draw = function (context, image) {
    function ease(t) {
    return (--t) * t * t + 1;
}
    var size = image.width * ease(this.age / settings.particles.duration);
    context.globalAlpha = 1 - this.age / settings.particles.duration;
    context.drawImage(image, this.position.x - size / 2, this.position.y - size / 2, size, size);
};
    return Particle;
})();


    var ParticlePool = (function () {
    var particles,
    firstActive = 0,
    firstFree = 0,
    duration = settings.particles.duration;

    function ParticlePool(length) {
    // create and populate particle pool
    particles = new Array(length);
    for (var i = 0; i < particles.length; i++)
    particles[i] = new Particle();
}
    ParticlePool.prototype.add = function (x, y, dx, dy) {
    particles[firstFree].initialize(x, y, dx, dy);

    // handle circular queue
    firstFree++;
    if (firstFree == particles.length) firstFree = 0;
    if (firstActive == firstFree) firstActive++;
    if (firstActive == particles.length) firstActive = 0;
};
    ParticlePool.prototype.update = function (deltaTime) {
    var i;


    if (firstActive < firstFree) {
    for (i = firstActive; i < firstFree; i++)
    particles[i].update(deltaTime);
}
    if (firstFree < firstActive) {
    for (i = firstActive; i < particles.length; i++)
    particles[i].update(deltaTime);
    for (i = 0; i < firstFree; i++)
    particles[i].update(deltaTime);
}


    while (particles[firstActive].age >= duration && firstActive != firstFree) {
    firstActive++;
    if (firstActive == particles.length) firstActive = 0;
}


};
    ParticlePool.prototype.draw = function (context, image) {

    if (firstActive < firstFree) {
    for (i = firstActive; i < firstFree; i++)
    particles[i].draw(context, image);
}
    if (firstFree < firstActive) {
    for (i = firstActive; i < particles.length; i++)
    particles[i].draw(context, image);
    for (i = 0; i < firstFree; i++)
    particles[i].draw(context, image);
}
};
    return ParticlePool;
})();


    (function (canvas) {
    var context = canvas.getContext('2d'),
    particles = new ParticlePool(settings.particles.length),
    particleRate = settings.particles.length / settings.particles.duration,
    time;


    function pointOnHeart(t) {
    return new Point(
    160 * Math.pow(Math.sin(t), 3),
    130 * Math.cos(t) - 50 * Math.cos(2 * t) - 20 * Math.cos(3 * t) - 10 * Math.cos(4 * t) + 25
    );
}


    var image = (function () {
    var canvas = document.createElement('canvas'),
    context = canvas.getContext('2d');
    canvas.width = settings.particles.size;
    canvas.height = settings.particles.size;

    function to(t) {
    var point = pointOnHeart(t);
    point.x = settings.particles.size / 2 + point.x * settings.particles.size / 350;
    point.y = settings.particles.size / 2 - point.y * settings.particles.size / 350;
    return point;
}

    context.beginPath();
    var t = -Math.PI;
    var point = to(t);
    context.moveTo(point.x, point.y);
    while (t < Math.PI) {
    t += 0.01;
    point = to(t);
    context.lineTo(point.x, point.y);
}
    context.closePath();

    context.fillStyle = '#ea80b0';
    context.fill();

    var image = new Image();
    image.src = canvas.toDataURL();
    return image;
})();


    function render() {

    requestAnimationFrame(render);


    var newTime = new Date().getTime() / 1000,
    deltaTime = newTime - (time || newTime);
    time = newTime;


    context.clearRect(0, 0, canvas.width, canvas.height);


    var amount = particleRate * deltaTime;
    for (var i = 0; i < amount; i++) {
    var pos = pointOnHeart(Math.PI - 2 * Math.PI * Math.random());
    var dir = pos.clone().length(settings.particles.velocity);
    particles.add(canvas.width / 2 + pos.x, canvas.height / 2 - pos.y, dir.x, -dir.y);
}


    particles.update(deltaTime);
    particles.draw(context, image);
}


    function onResize() {
    canvas.width = canvas.clientWidth;
    canvas.height = canvas.clientHeight;
}
    window.onresize = onResize;


    setTimeout(function () {
    onResize();
    render();
}, 10);
})(document.getElementById('pinkboard'));